The problem here is that you are creating a hardcoded ID... one that has to be converted to the TYPE (ie id.toLong()). This means that it is more a NATURAL KEY than a primary (read issues with 'Natural keys')

Thus it is not being protected from duplication, synchronized with the other keys and can potentially even pull up false/innacurate records

What you SHOULD be doing is searching on an INDEX instead (if you want to try somnething like this)